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monitoring or diagnosis by maintenance personnel. The system is integrated into the FADEC of each engine.
ECFR EVENT SWITCH
The EVENT switch is located on the engine control panel. The switch allows the flight crew to manually initiate data collection
to the ECFR.
POWERPLANT
May 06/2005 Flight Crew Operating Manual Volume 2
REV 2 CSP 100-6 18-01-07
ENGINE CONTROL SYSTEM (Cont)
THRUST CALCULATIONS
FADEC automatically computes a target thrust rating for thrust lever position and presents the target or maximum value on
the N1 indicator.
On the ground, normal rated takeoff thrust is automatically calculated when an engine is started. Normal rated N1 takeoff
rpm is continuously updated for changes in the Mach number, delta ambient temperature, and pressure altitude.
During the takeoff roll, the N1 normal rated takeoff thrust value is continuously updated as the aircraft accelerates. At 65
kt discrete inputs for the thrust calculations are locked in. The calculation is unlocked when the aircraft altitude exceeds
400 ft. AGL or the thrust lever is retarded from the TO detent.
The cyan color target N1 appears on the N1 indicator as:
- N1 caret (doughnut for cruise power)
- N1 digital reference
-Thrust mode annunciation
THRUST MODE ANNUNCIATION
The thrust mode annunciation identifies the position of the thrust lever during most phases of operation or a specific armed
condition.
With both engines operating, the following thrust mode annunciations are presented:
- APR
- TO
- CLB
- CRZ
- REV
MAX POWER (APR)
When either or both thrust levers are placed in the APR detent, the FADEC increases the engine thrust to automatic power
reserve power (APR). The APR power setting is an emergency thrust setting.
To protect against inadvertent APR activation, the pilot must apply increased force to move the thrust lever forward to the
APR detent.
APR thrust is indicated on the associated N1 gauge by:
- Cyan caret
- Cyan N1 digital reference
- Cyan APR icon
AUTO APR FUNCTION
- AUTO APR function indications are the same as APR indications. If the aircrew elects to disable the AUTO APR
function, an AUTO APR OFF (S) CAS message is displayed and the AUTO APR OFF switch is illuminated.
NORMAL-RATED TAKEOFF N1 INDICATIONS (TO)
Normal-rated takeoff thrust is automatically calculated by FADEC when electrical power is applied to the aircraft on the
ground. Takeoff thrust is set on the takeoff roll by placing the thrust levers in the TO detent.
The programmed normal-rated takeoff thrust value is displayed on the MFD by the following indications:
- Cyan caret
- Cyan N1 digital reference
- Cyan TO thrust mode annunciation for takeoff thrust
POWERPLANT
Volume 2 Flight Crew Operating Manual May 06/2005
18-01-08 CSP 100-6 REV 2
ENGINE CONTROL SYSTEM (Cont)
CLIMB THRUST (CLB)
When the thrust lever is placed in the CLB detent, the FADEC electronically programs the engine to accelerate or decelerate
to the climb thrust setting.
The programmed climb thrust value is displayed on the MFD EICAS by the following indications:
- Cyan caret
- Cyan N1 digital reference
- Cyan CLB thrust mode annunciation
CRUISE RANGE (CRZ)
Cruise power is unlike other thrust settings in that it is not associated with a thrust lever detent.
Cruise power is set by positioning the thrust lever in the quadrant range that exists between the IDLE and CLIMB detents.
In this range, the pilot manually sets the thrust levers to maintain cruise speed or sets thrust for the descent and approach.
In cruise, FADEC does not set the cruise thrust to match the FADEC generated maximum cruise thrust target value. To
distinguish maximum cruise power (CRZ) from other detent-related thrust settings, a cyan N1 doughnut is used instead of
a caret.
Maximum cruise power (CRZ) is indicated by the following:
- Cyan doughnut
- Cyan N1 digital reference
- Cyan CRZ thrust mode annunciation
BLEED AIR EXTRACTION
When the thrust levers are in any of the detents and a new bleed air demand is placed on the engines, the N1 target rpm may
change to compensate for the new bleed-air demands.
POWERPLANT
May 06/2005 Flight Crew Operating Manual Volume 2
REV 2 CSP 100-6 18-01-09
N1 AND N2 SYNCHRONIZATION
DESCRIPTION
OFF, N1, or N2, is selected with the AUTO SYNC switch, located on the ENGINE control panel. When SYNC (N1 or N2)
is selected, the two engines are synchronized if the thrust levers are in the CRZ or CLB setting.
COMPONENTS AND OPERATION
ENGINE SYNCHRONIZATION
When the AUTO SYNC selector switch is set to N1, the FADEC matches the fan speed of the slave engine to the speed of
　
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